Knowledge Of The Automotive Fault
First test can diagnose. Diagnostic techniques can often be used in a launch x431. With the test car and engine fault diagnosis is one of the methods used, can test the car without disassembly or less disintegration in the circumstances, the functions of cars and engines in order to achieve the purpose of fault diagnosis. The so-called trial, is to try to verify. To try to determine clear. The owner reported that the brake system not working, can ride in the car park under the foot brake pedal position, brake system immediately issued a set of braking action, brake tests were given according to the sound of braking system fault judge ; unclear if a time to judge if, you can road test about a certain speed stepping foot under the brake pedal, braking system, testers can brake and the brake reaction after the issue of noise, etc. integrated braking system to judge the fault. Similarly, the steering system failure, pilot can switch to the steering wheel in place, the steering wheel to the steering wheel rotates a set of actions can be judged steering system failure.
Unclear if the judge can try to walk the car open, conscious of the curve on the rotating steering wheel, steering systems work, testing can somewhere under the steering response and occurrence of abnormal sound judgments steering system failure. For the engine failure, we must check the functioning of the engine, test persons with different speed or acceleration and deceleration operation of the engine, to use their experience to observe the functioning of the engine, the sound of the engine to use their experience to auscultation, normal faults can be found. When a photo is not on, doubt no power when the circuit can be used to end a wire short-circuit test program on the fire inspection, and fire can be judged as an electric circuit, without further investigation the fire. However, many lines with fuse and relay, test fire must be cautious. The normal operation of motor vehicles and engines have a certain regularity, is not the normal occurrence of a fault, can not test out the normal, normal and abnormal for the judge, should have done theoretical and empirical guidance.
Second, using the touch method can diagnose. The hands of the human body and human sensory organs are sensitive, can seat of your pants to diagnose vehicle and engine failure, the same as Chinese Qiemo. Spread to the human body on a car feeling judged. lexia3 is a good diagnostic method used. People traveling by car, driving in the car coin is judged the vibration and shock absorber suspension system damage, usually the driver the most sensitive, and often drive a car after the driver can feel the shock absorber failure. Car to the road or high speed, usually the driver must check the four wheels, feet kick the wheels tires, tire stretch coin determine tire pressure, tire deflection and the coin is judged shimmy Compact Wheel Bearings solid case, that is, their feet touch the typical method.
Car on the highway, the driver can hand to touch the tire temperature, tire wear the hot summer so we must be careful. Hand brake drum can touch, try brake drum temperature; or shuilin the brake drum on, take a look at the situation of water evaporation, it can determine whether the drag brake drum lag. When found in the engine cooling system overheating in coolant, they can hand to touch the upper and lower radiator, thermostat can be judged is damaged or blocked radiator intake; touch the water pump outlet hose can feel water pressure fluctuations, indicating pumps working properly. Check belt finger pressure tightness, feeling the fuel pump with your fingers, as well as hand-touch high-pressure tubing check oil condition, are frequently encountered. In the maintenance, inspection hand touch friction surface wear; hand feeling the tightness of the friction pair with, are everywhere in the ubiquitous use. In short, the hand is the body's vital organs, living a hand-dry, in the sense of work in there, and this feeling is best equipment fault diagnosis.
Diagnosis of smell can also malfunction. We can often use launch x431,lexia3,mb star.Sensitive sense of smell is the human sense organs, some say fewer people traveling by car than the driver's sense of smell sense of smell is more sensitive, in fact the driver's sense of smell is often played down the car smell, is the so-called "living in the city does not smell the rot stink ", though the dashboard display perfume before the stage to offset the car's smell, the driver just pay attention to the various cars are able to smell the odor. Taste is the smell of diesel vehicles common one, plus diesel has leaked, people can smell, it is not surprising. The strange thing is ignorant of the diesel car is moving, is a diesel pipe leakage, or incomplete combustion engine, to take seriously. The smell engine exhaust, said engine burning oil and engine combustion is incomplete.
If you smell great, braking the car is more obvious, it should adjust or repair the engine. Do not overlook the use of mb star. Special non-metallic materials burnt smell, said clutch burning or burnt wires, to carefully check whether the smoking behavior somewhere, or whether the heat stroke somewhere in order to determine the fault location. Engine oil leakage, leakage to the operation of the engine, the engine temperature is high, happen odor; oil dripping on the exhaust pipe will occur in the more intense odor; engine smell easily enter the car from the air-conditioned room, you can clearly smell. Automotive battery battery leakage water (electrolyte) will be issued unpleasant odor; if the battery consumption of too much water, car running generator forced to battery charging, battery charging will overheat the battery to run the white smoke, smell more or even to people smoked halo, anyone can judge. Car on the other media leaks, such as power steering oil, transmission oil leak and so will the odor, but more carefully to smell; car article or leakage of flammable and explosive materials should also attract attention. In short, the car running in the event of a smell or odor when large parking further examination to identify failure root causes and take appropriate measures to eliminate any odor, in the case of car failure should be excluded or car repair.
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